Set python_version to be used with base-setup action

Author: lresende

.github/workflows/build.yml

@@ -77,6 +77,8 @@ jobs:
 
   link_check:
     runs-on: ubuntu-latest
+    env:
+      PYTHON_VERSION=3.11
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python 3.11